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from the config file, so that these changes will propagate to backends started later. Already-started backends continue to ignore changes in these variables.
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*
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* guc.h
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*
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* External declarations pertaining to backend/utils/misc/guc.c and
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* backend/utils/misc/guc-file.l
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*
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* $Id: guc.h,v 1.10 2001/09/30 20:16:21 tgl Exp $
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*/
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#ifndef GUC_H
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#define GUC_H
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/*
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* Certain options can only be set at certain times. The rules are
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* like this:
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*
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* POSTMASTER options can only be set when the postmaster starts,
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* either from the configuration file or the command line.
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*
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* SIGHUP options can only be set at postmaster startup or by changing
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* the configuration file and sending the HUP signal to the postmaster
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* or a backend process. (Notice that the signal receipt will not be
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* evaluated immediately. The postmaster and the backend block at a
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* certain point in their main loop. It's safer to wait than to read a
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* file asynchronously.)
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*
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* BACKEND options can only be set at postmaster startup, from the
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* configuration file, or with the PGOPTIONS variable from the client
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* when the connection is initiated. Furthermore, an already-started
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* backend will ignore changes to such an option in the configuration
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* file. The idea is that these options are fixed for a given backend
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* once it's started, but they can vary across backends.
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*
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* SUSET options can be set at postmaster startup, with the SIGHUP
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* mechanism, or from SQL if you're a superuser. These options cannot
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* be set using the PGOPTIONS mechanism, because there is not check as
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* to who does this.
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*
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* USERSET options can be set by anyone any time.
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*/
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typedef enum
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{
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PGC_POSTMASTER,
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PGC_SIGHUP,
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PGC_BACKEND,
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PGC_SUSET,
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PGC_USERSET
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} GucContext;
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extern void SetConfigOption(const char *name, const char *value,
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GucContext context, bool makeDefault);
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extern const char *GetConfigOption(const char *name);
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extern void ProcessConfigFile(GucContext context);
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extern void ResetAllOptions(bool isStartup);
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extern void ParseLongOption(const char *string, char **name, char **value);
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extern bool set_config_option(const char *name, const char *value,
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GucContext context, bool DoIt, bool makeDefault);
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extern void ShowAllGUCConfig(void);
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extern bool Debug_print_query;
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extern bool Debug_print_plan;
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extern bool Debug_print_parse;
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extern bool Debug_print_rewritten;
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extern bool Debug_pretty_print;
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extern bool Show_parser_stats;
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extern bool Show_planner_stats;
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extern bool Show_executor_stats;
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extern bool Show_query_stats;
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extern bool Show_btree_build_stats;
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extern bool SQL_inheritance;
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extern bool Australian_timezones;
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#endif /* GUC_H */
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